Time dependent C trachomatis infection rates among 3860 sexually active females at 11 904 clinic visits >30 days apart diagnosed by PCR in Baltimore, MD, family planning, sexually transmitted diseases, and school based clinics, Jan 1994–Sept 1996
| Age (years) | Incidence* (95% CI) (person months) | Time to first infection† (25%–75%) (months) | Time to repeat infection† (25–75%) (months) |
|---|---|---|---|
| *Cases per 1000 person months. | |||
| †Incident infections. | |||
| <25 | 20.3 (18.4–22.5) | 7.0 (4.1–11.1) | 7.6 (5.0–12.3) |
| ≥25 | 3.6 (2.9–4.4) | 13.8 (6.3–18.3) | 11.0 (4.2–18.3) |